diff --git a/runtime/mainnet/src/config/mod.rs b/runtime/mainnet/src/config/mod.rs
index afb14b24..4f984bcb 100644
--- a/runtime/mainnet/src/config/mod.rs
+++ b/runtime/mainnet/src/config/mod.rs
@@ -16,5 +16,3 @@ mod revive;
 mod utility;
 /// XCM.
 pub mod xcm;
-// Collation.
-mod collation;